Παραπομπή APA

Spencer, C. S. (2010). Territorial expansion and primary state formation. National Academy of Sciences.

Παραπομπή Chicago Style

Spencer, Charles S. Territorial Expansion and Primary State Formation. National Academy of Sciences, 2010.

Παραπομπή MLA

Spencer, Charles S. Territorial Expansion and Primary State Formation. National Academy of Sciences, 2010.

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